I mean honestly the grass one looks like a treecko and a turtwig mix that went terribly wrong and really a frog? I hate how they reuse the same modern day animals over and over again....we do have more animals that are water related then just the frog!
1. if you take a look at each starter there's a resemblance to a Species or a family.
Charizard - Lizard/Dragon
Typhlosion - Volcanic rodent
Blaziken - Chicken/Rooster
Infernape - Fire Ape/Monkey
Emboar - Roasted Pig
Year of the Rat - Typhlosion the Volcanic Rat
Year of the Dragon - Charizard
Year of the Pig - Emboar
Year of the Monkey - Infernape
Year of the Rooster - Blaziken
Fire Types resemble the Years.
Venusaur - The plant dinosaur
Meganium - the Long neck dinosaur
Sceptile - this pokemon is suppose to represent Leaf eaters.
Torterra - Turtle/dinosaur
Serperior - Snake
Grass pokemon represent the past animals like dinosaurs etc. Leaf eaters.
Blastoise - Turtle
Feralligatr - Alligator
Swampert - fish
Empoleon - Penguin
Samurott - dog/fish
represent Creatures that dwell in the waters such as Amphibians, and mammals etc.